Trevor D. Price

TL;DR: Genome-wide analyses show that, although spatial patterns of genetic variation are currently mostly as expected of a ring species, historical breaks in gene flow have existed at more than one location around the ring, and the two Siberian forms have occasionally interbred, casting doubt on the hypothesis that the greenish warbler should be viewed as a rare example of speciation by distance.

TL;DR: The niche variation hypothesis is an adaptive explanation for variation within populations and for, the differences in variation between populations in morphological, physiological or behavioral traits, and it is concluded that empirical studies lag far behind theory.

TL;DR: The diets of a banded population of Darwin's Medium Ground Finches on Isla Daphne Major, Galapagos, between 1979 and 1981 were studied, showing how an individual's diet was constrained to a subset of the foods that the population as a whole exploits, and how anindividual selected from among the foods available to it.

TL;DR: The breeding season distribution of species among habitats may be partly a result of inherent differences in foraging abilities, but that other factors, probably including current competition, must contribute to limiting distributions.

TL;DR: This study compares the relative importance of immigration versus in situ speciation to the build-up of the Himalayan avifauna, by evaluating the biogeographic history of the Phylloscopus/Seicercus warblers, a speciose clade that is well represented in Himalayan forests.